WordNet (r) 3.0 (2006):

beer garden
    n 1: tavern with an outdoor area (usually resembling a garden)
         where beer and other alcoholic drinks are served

Moby Thesaurus II by Grady Ward, 1.0:

32 Moby Thesaurus words for "beer garden":
   alehouse, bar, barrel house, barroom, beer hall, beer parlor,
   bistro, blind tiger, cabaret, cafe, cocktail lounge, dive,
   dramshop, drinking saloon, gin mill, groggery, grogshop,
   honky-tonk, local, nightclub, pothouse, pub, public, public house,
   rathskeller, rumshop, saloon, saloon bar, speakeasy, taproom,
   tavern, wine shop